In a proportional relationship the ratio y/x is constant. show that this ratio is not constant for the equation y=a-14

To show that the ratio is not constant for the function we only need to evaluate this function at 2 points and then show that the ratio is not the same for those two points. Note that here represents .  

To find the counter examples here, I will use the values  and . For , the equation tells us that the output is

. For this value of the point is point is . The ratio . For the , . For this value of the  point is . The ratio . Clearly this ratio is not constant for all ordered pairs.

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